*Router: swiCE2.switch.ch* *Command: show ip bgp 46.239.64.0/24* *% Network not in table* * * *Router: *swiCE2.switch.ch *Command: *show ip bgp 46.239.64.0/21 BGP routing table entry for 46.239.64.0/21, version 21580932 Paths: (1 available, no best path) Multipath: eBGP Not advertised to any peer 3356 3549 16150 2840, (received-only) 213.242.73.73 from 213.242.73.73 (4.69.187.34) Origin IGP, metric 0, localpref 100, valid, external Community: 3356:2 3356:22 3356:86 3356:502 3356:666 3356:2066 3549:350 3549:4773 3549:31208 16150:80 16150:40752 16150:63392 * * *Router:* swiCE2.switch.ch *Command:* ping 46.239.64.34
Type escape sequence to abort. Sending 5, 100-byte ICMP Echos to 46.239.64.34, timeout is 2 seconds: !!!!! Success rate is 100 percent (5/5), round-trip min/avg/max = 40/42/44 ms
*Router:* swiCE2.switch.ch *Command:* trace 46.239.64.34
Type escape sequence to abort. Tracing the route to ns4.gsix.se (46.239.64.34) VRF info: (vrf in name/id, vrf out name/id) 1 te-3-4.car1.Geneva1.Level3.net (213.242.73.73) 0 msec 0 msec 0 msec 2 ae-5-5.car1.Lyon1.Level3.net (4.69.137.82) [MPLS: Label 709 Exp 0] 12 msec 8 msec 8 msec 3 ae-9-9.ebr2.Paris1.Level3.net (4.69.134.50) [MPLS: Label 1758 Exp 0] 12 msec 12 msec 8 msec 4 ae-72-72.csw2.Paris1.Level3.net (4.69.161.98) [MPLS: Label 1720 Exp 0] 8 msec ae-62-62.csw1.Paris1.Level3.net (4.69.161.94) [MPLS: Label 1744 Exp 0] 12 msec ae-92-92.csw4.Paris1.Level3.net (4.69.161.106) [MPLS: Label 1574 Exp 0] 8 msec 5 4.69.168.7 12 msec 4.69.168.199 48 msec 4.69.168.71 40 msec 6 global-crossing-xe-level3.paris1.level3.net (4.68.127.98) 12 msec 8 msec 12 msec 7 RIX-TELECOM-AB.TenGigabitEthernet7-3.ar3.CPH1.gblx.net (64.211.111.154) 24 msec 28 msec 28 msec 8 te3-1-r72.cr0-r74.shg5-got.no.p80.net (82.96.1.53) 32 msec 28 msec 32 msec 9 94.136.70.42 32 msec 32 msec 32 msec 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 Timed out waiting for data: write error: filehandle isn't open
[root@uc ~]# traceroute 46.239.64.34 traceroute to 46.239.64.34 (46.239.64.34), 30 hops max, 60 byte packets 1 ve24.ccr01.zrh01.neocarrier.net (217.146.49.1) 2.690 ms 2.739 ms 2.796 ms 2 ae0.419.ar3.ZRH1.gblx.net (64.214.129.5) 0.476 ms 0.526 ms 0.607 ms 3 ae4.scr3.FRA4.gblx.net (67.16.146.10) 5.192 ms ae1.scr4.FRA4.gblx.net (67.16.145.234) 5.191 ms 38.520 ms 4 po1.ar3.CPH1.gblx.net (67.17.105.242) 32.030 ms 32.045 ms po3.ar3.CPH1.gblx.net (67.17.105.246) 32.097 ms 5 RIX-TELECOM-AB.TenGigabitEthernet7-3.ar3.CPH1.gblx.net (64.211.111.154) 33.665 ms 33.660 ms 33.896 ms 6 te3-1-r72.cr0-r74.shg5-got.no.p80.net (82.96.1.53) 32.421 ms 32.461 ms 32.421 ms 7 94.136.70.42 (94.136.70.42) 37.392 ms 37.372 ms 37.432 ms 8 * * * 9 * * * 10 * * * 11 * * * 12 * * * 13 * * * 14 * * * 15 * * * 16 * * * 17 * * * 18 * * * 19 * * * 20 * * * 21 * * * 22 * * * 23 * * * 24 * * * 25 * * * 26 * * * 27 * * * 28 * * * 29 * * * 30 * * *
traceroute to 46.239.64.34 (46.239.64.34), 30 hops max, 60 byte packets 1 ve24.ccr01.zrh01.neocarrier.net (217.146.49.1) 0.297 ms 0.390 ms 0.475 ms 2 ae0.419.ar3.ZRH1.gblx.net (64.214.129.5) 0.467 ms 0.538 ms 0.621 ms 3 ae1.scr4.FRA4.gblx.net (67.16.145.234) 5.192 ms ae4.scr3.FRA4.gblx.net (67.16.146.10) 5.183 ms 5.190 ms 4 po3.ar3.CPH1.gblx.net (67.17.105.246) 32.021 ms po1.ar3.CPH1.gblx.net (67.17.105.242) 32.089 ms po3.ar3.CPH1.gblx.net (67.17.105.246) 32.041 ms 5 RIX-TELECOM-AB.TenGigabitEthernet7-3.ar3.CPH1.gblx.net (64.211.111.154) 33.674 ms 33.769 ms 33.757 ms 6 te3-1-r72.cr0-r74.shg5-got.no.p80.net (82.96.1.53) 32.482 ms 32.495 ms 32.468 ms 7 94.136.70.42 (94.136.70.42) 176.607 ms 168.731 ms 168.715 ms 8 ns1.sgsit.se (46.239.64.34) 43.376 ms 43.370 ms 43.397 ms
My take..
The network 46.239.64.0/24 is not found in BGP routing table, but 46.239.64.0/21 is there, obvious nothing silly here.
The target responds from switch to ping, which means each side can talk to each other (http://www.switch.ch/network/tools/lookingglass/).
Traceroute seems quite complete until penultimate device using standard UDP traceroute, but works using ICMP works until target..
Probably a misinterpreted traceroute result..
On 3 May 2013 16:01, Jeroen Massar jeroen@massar.ch wrote:
On 2013-05-03 15:49 , Ambauen Daniel wrote: [..]
Traceroute from our gatway to SWITCH the IP 46.239.64.34 is not
reachable.
And thus likely a transit issue, not really a DNS issue (though having both DNS servers in the same /24 is ... of course).
[..]
12 availo-ic-151342-kbn-b3.c.telia.net (80.239.128.170) (AS 559)
33.115 ms 33.063 ms 32.829 ms
13 te3-1-r72.cr0-r74.shg5-got.no.p80.net (82.96.1.53) (AS 559) 36.462
ms 36.371 ms 44.196 ms
14 94.136.70.42 (94.136.70.42) (AS 559) 36.686 ms 35.728 ms 36.002 ms 15 * * *
But the last hop 94.136.70.42 before 46.239.64.34 is reachable from our
side.
Which likely means that they cannot reach your prefix, as you do have a route towards them. (though that is likely, filtering and other many problems can also be the case of course)
[..]
The entire subnet 46.239.64.34/24 is not reachable from my site.
And hence why neither DNS or anything else that is hosted on it works.
Best to contact SWITCH, who are effectively your transit, and let them contact Telia and then likely P80 who can figure out the next step where it goes wrong.
Greets, Jeroen
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